One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(9,10,12,14)(11,15,16,13)(17,18,23,28)(19,24,32,41)(20,25,35,44)(21,26,22,27)(29,38,33,42)(30,39,47,48)(31,40,37,46)(34,43,36,45)(1,3,5,4)(2,6,8,7)(11,16)(13,15)(17,19)(18,24)(20,33)(21,31)(22,37)(23,32)(25,42)(26,40)(27,46)(28,41)(29,35)(30,34)(36,47)(38,44)(39,43)(45,48)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,29)(21,36)(22,34)(23,35)(24,38)(26,45)(27,43)(28,44)(30,31)(32,33)(37,47)(39,40)(41,42)(46,48)(1,3,5,4)(2,7,8,6)(10,14)(13,15)(17,20)(18,25)(19,30)(21,34)(22,36)(23,35)(24,39)(26,43)(27,45)(28,44)(29,31)(32,47)(33,37)(38,40)(41,48)(42,46)(1,4,5,3)(2,7,8,6)(17,21,23,22)(18,26,28,27)(19,31,32,37)(20,34,35,36)(24,40,41,46)(25,43,44,45)(29,47,33,30)(38,48,42,39)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.